摘要
驾驶精神疲劳是威胁人们健康与生命安全的严重问题。本研究的目的是基于心率变异性与血压变异性功率谱分析综合评估驾驶员精神疲劳。2 0个健康男性样本(2 8.8±4 .3)岁参加90 m in的模拟驾驶操作实验,实验后计算分析实验样本心率变异性和血压变异性的频域指标,如:低频成分(0 .0 4～0 .15 Hz,L F) ,高频成分(0 .15～0 .4 Hz,HF) ,代频与高频比值(L F/ HF) ;同时分析反映血流动力学指标的血压和心率。研究表明,样本在实验结束后交感神经兴奋性增强,迷走神经兴奋性减弱,交感迷走平衡性升高;同时,心率变异性与血压变异性的对应指标在实验过程中具有良好的相关性(P<0 .0 5 )。研究认为采用多变量综合效应分析方式评价自主神经系统功能是科学和客观的。
Driving mental fatigue is a substantial problem and threatens people＇s health and life, This investigation was made to evaluate the driving mental fatigue based on power spectral analysis of heart rate variability（HRV） and blood pressure variability （BPV） synthetically. Twenty health male subjects （28. 8±4. 3 years） were required to perform the simulated driving for 90 min. The frequency domain indices of HRV such as low frequency（0.04-0. 15 Hz, LF）, high frequency（0.15-0.4 Hz, HF）,LF/HF together with the indices of hemodynamics such as blood pressure （BP） and heart rate （HR） of the subjects were calculated and anlyzed after the simulated driving. The results showed that sympathetic activity of the subjects enhanced after the simulated driving while parasympathetic activities decreased. The sympathovagal balance was also improved. Remarkable linear correlations were observed between all the corresponding indices of HRV and BPV（P〈0. 05）. The findings suggested that the evaluation of autonomic activities by means of multi-variable synthetic effect analysis is scientific and objective.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
2005年第2期343-346,共4页
Journal of Biomedical Engineering
